54297267 Wireless Power Transmission Ppt

7/28/2019 54297267 Wireless Power Transmission Ppt

1/26

Wireless PowerTransmission

Presented by

Shubham Jain0809010094Department of Computer Science Engineering

IEC College of Engineering and Technology, Gr.Noida


2/26

08/13/11

Wireless Power Transmission

2

Overview What is wireless power transmission(WPT)? Why is WPT?

1940s to Present Microwave transmission Rectenna Applications Space-based solar power SPS 2000

Advantages Conclusion References


3/26

08/13/11


3

What is WPT?The transmission of energy from one

place to another without using

wires Conventional energy transfer is using

wires As per studies, most electrical energy

transfer is through wires. Most of the energy loss is during

transmission On an average, more than 30%

In India, it exceeds 40%


4/26

08/13/11


4

Why WPT?

ReliableEfficientFastLow maintenance costCan be used for short-range

or long-range.


5/26

1940s to Present

World War II developed ability toconvert energy to microwaves using a

magnetron, no method forconverting microwaves back toelectricity

1964 William C. Brown demonstrated a

rectenna which could convertmicrowave power to electricity


6/26

Microwave transmission

Microwave transmission refers to the technologyof transmitting information by the use of radiowaves whose wavelengths are conveniently

measured in small numbers of centimeters; theseare called microwaves.

This part of the radio spectrum rangesacross frequencies of roughly1.0 gigahertz (GHz) to 30 GHz.

These correspond to wavelengths from30 centimeters down to 1.0 cm.


7/26

08/13/11


7

Microwave PowerTransfer(MPT) Cont.

Transfers high power from one place to another.Two places being in line of sight usually

Steps: Electrical energy to microwave energy

Capturing microwaves using rectenna

Microwave energy to electrical energy


8/26

08/13/11


8

MP T (cont.) AC can not be directly converted to

microwave energy

AC is converted to DC first DC is converted to microwaves using

magnetronTransmitted waves are received at

rectenna which rectifies, gives DC asthe output DC is converted back to AC


9/26

Rectenna

An antenna comprising a mesh of dipolesand diodes for absorbing microwave

energy from a transmitter and convertingit into electric power.

Microwaves are received with about85% efficiency.

Around 5km across (3.1 miles)95% of the beam will fall on the

rectenna.


10/26

5,000 MW Receiving Station(Rectenna). This station is about a mile

and a half long in US.


11/26

Applications


12/26

08/13/11


12

Space-based solar power

1968s idea for Solar Power Satellitesproposed by Peter Glaser

Would use microwaves to transmit power toEarth from Solar Powered Satellites

To efficiently make use of renewableenergy i.e., solar energy

Solar Powered Satellites are placed ingeostationary orbits


13/26

From the Satellite

Solar power from the satellite

is sent to Earth using amicrowave transmitter

Received at a rectennalocated on Earth


14/26

Possible Designs


15/26


16/26

Advantages over Earth basedsolar power

More intense sunlight

In geosynchronous orbit, 36,000 km

(22,369 miles) an SPS would beilluminated over 99% of the time

No need for costly storage devices forwhen the sun is not in view

Only a few days at spring and fallequinox would the satellite be inshadow


17/26

08/13/11


17

Other projects Alaska21

Grand Bassin Hawaii


18/26

Current Developments


19/26

SPS 2000


20/26

Details

Project inDevelopment in

Japan Goal is to build a low

cost demonstrationmodel by 2025

8 Countries along theequator haveagreed to be thesite of a rectenna


21/26

Continued

10 MW satellite delivering microwavepower

Will not be in geosynchronousorbit, instead low orbit 1100 km(683 miles)

Much cheaper to put a satellite in

low orbit200 seconds of power on each

pass over rectenna


22/26


23/26

08/13/11


23

Advantages of Wireless energytransfer

Efficient

Easy

Need for grids, substations etc areeliminated

Low maintenance cost

More effective when the transmitting

and receiving points are along a line-of-sight

Can reach the places which are remote


24/26

Conclusions

More reliable than Traditional power

In order for WPT to become a reality it

several things have to happen: Government support

Cheaper launch prices

Involvement of the private sector


25/26

08/13/11


25

References S. Sheik Mohammed, K. Ramasamy, T.

Shanmuganantham, Wireless power

transmission a next generation powertransmission system, InternationalJournal of Computer Applications (0975 8887) (Volume 1 No. 13)

Peter Vaessen, Wireless Power

Transmission, Leonardo Energy,September 2009

Wikipedia


26/26

08/13/11


26

THANK YOU!

54297267 Wireless Power Transmission Ppt

Documents

Transcript of 54297267 Wireless Power Transmission Ppt